摘要
为了解沥青混合料在自然老化历程中抗剪强度的演变规律,采用单轴贯入试验与单轴压缩试验对不同自然老化时间后的沥青混合料,在干燥和冻融循环后饱水两种情况下进行试验。试验结果表明:老化过程中沥青混合料的抗剪强度逐渐下降,在饱水状态下比在干燥状态下有更强的抵抗荷载作用的能力;随着老化程度的增加,冻融循环抗剪强度比有上升的趋势;另外水对自然老化后的沥青混合料的进一步侵蚀作用不明显。
In order to study the shear strength change of asphalt mixture during the natural aging process, uniaxial penetration test and uniaxial compression test were conducted on asphalt mixture in different natural aging process. The test results showed that the shear strength of asphalt mixture decreased with the ag- ing process, and asphalt mixture showed greater ability to resist the action of loadings ; the shear strength after freeze - thaw cycle showed increasing trend with aging process ; besides, the effect of water on the asphalt mix- ture during the aging process was not significant.
出处
《石油沥青》
2012年第4期61-66,共6页
Petroleum Asphalt
关键词
沥青混合料
自然老化
抗剪强度
单轴贯入试验
单轴压缩试验
asphalt mixture
natural aging
shear strength
uniaxial penetration test
uniaxial compres-sion test
